Pileus Git - ~andy/linux/blob - drivers/target/target_core_device.c

   1 /*******************************************************************************
   2  * Filename:  target_core_device.c (based on iscsi_target_device.c)
   3  *
   4  * This file contains the TCM Virtual Device and Disk Transport
   5  * agnostic related functions.
   6  *
   7  * Copyright (c) 2003, 2004, 2005 PyX Technologies, Inc.
   8  * Copyright (c) 2005-2006 SBE, Inc.  All Rights Reserved.
   9  * Copyright (c) 2007-2010 Rising Tide Systems
  10  * Copyright (c) 2008-2010 Linux-iSCSI.org
  11  *
  12  * Nicholas A. Bellinger <nab@kernel.org>
  13  *
  14  * This program is free software; you can redistribute it and/or modify
  15  * it under the terms of the GNU General Public License as published by
  16  * the Free Software Foundation; either version 2 of the License, or
  17  * (at your option) any later version.
  18  *
  19  * This program is distributed in the hope that it will be useful,
  20  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  21  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  22  * GNU General Public License for more details.
  23  *
  24  * You should have received a copy of the GNU General Public License
  25  * along with this program; if not, write to the Free Software
  26  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  27  *
  28  ******************************************************************************/
  29
  30 #include <linux/net.h>
  31 #include <linux/string.h>
  32 #include <linux/delay.h>
  33 #include <linux/timer.h>
  34 #include <linux/slab.h>
  35 #include <linux/spinlock.h>
  36 #include <linux/kthread.h>
  37 #include <linux/in.h>
  38 #include <linux/export.h>
  39 #include <net/sock.h>
  40 #include <net/tcp.h>
  41 #include <scsi/scsi.h>
  42 #include <scsi/scsi_device.h>
  43
  44 #include <target/target_core_base.h>
  45 #include <target/target_core_backend.h>
  46 #include <target/target_core_fabric.h>
  47
  48 #include "target_core_internal.h"
  49 #include "target_core_alua.h"
  50 #include "target_core_pr.h"
  51 #include "target_core_ua.h"
  52
  53 static void se_dev_start(struct se_device *dev);
  54 static void se_dev_stop(struct se_device *dev);
  55
  56 static struct se_hba *lun0_hba;
  57 static struct se_subsystem_dev *lun0_su_dev;
  58 /* not static, needed by tpg.c */
  59 struct se_device *g_lun0_dev;
  60
  61 int transport_lookup_cmd_lun(struct se_cmd *se_cmd, u32 unpacked_lun)
  62 {
  63         struct se_lun *se_lun = NULL;
  64         struct se_session *se_sess = se_cmd->se_sess;
  65         struct se_device *dev;
  66         unsigned long flags;
  67
  68         if (unpacked_lun >= TRANSPORT_MAX_LUNS_PER_TPG) {
  69                 se_cmd->scsi_sense_reason = TCM_NON_EXISTENT_LUN;
  70                 se_cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION;
  71                 return -ENODEV;
  72         }
  73
  74         spin_lock_irqsave(&se_sess->se_node_acl->device_list_lock, flags);
  75         se_cmd->se_deve = &se_sess->se_node_acl->device_list[unpacked_lun];
  76         if (se_cmd->se_deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS) {
  77                 struct se_dev_entry *deve = se_cmd->se_deve;
  78
  79                 deve->total_cmds++;
  80                 deve->total_bytes += se_cmd->data_length;
  81
  82                 if ((se_cmd->data_direction == DMA_TO_DEVICE) &&
  83                     (deve->lun_flags & TRANSPORT_LUNFLAGS_READ_ONLY)) {
  84                         se_cmd->scsi_sense_reason = TCM_WRITE_PROTECTED;
  85                         se_cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION;
  86                         pr_err("TARGET_CORE[%s]: Detected WRITE_PROTECTED LUN"
  87                                 " Access for 0x%08x\n",
  88                                 se_cmd->se_tfo->get_fabric_name(),
  89                                 unpacked_lun);
  90                         spin_unlock_irqrestore(&se_sess->se_node_acl->device_list_lock, flags);
  91                         return -EACCES;
  92                 }
  93
  94                 if (se_cmd->data_direction == DMA_TO_DEVICE)
  95                         deve->write_bytes += se_cmd->data_length;
  96                 else if (se_cmd->data_direction == DMA_FROM_DEVICE)
  97                         deve->read_bytes += se_cmd->data_length;
  98
  99                 deve->deve_cmds++;
 100
 101                 se_lun = deve->se_lun;
 102                 se_cmd->se_lun = deve->se_lun;
 103                 se_cmd->pr_res_key = deve->pr_res_key;
 104                 se_cmd->orig_fe_lun = unpacked_lun;
 105                 se_cmd->se_cmd_flags |= SCF_SE_LUN_CMD;
 106         }
 107         spin_unlock_irqrestore(&se_sess->se_node_acl->device_list_lock, flags);
 108
 109         if (!se_lun) {
 110                 /*
 111                  * Use the se_portal_group->tpg_virt_lun0 to allow for
 112                  * REPORT_LUNS, et al to be returned when no active
 113                  * MappedLUN=0 exists for this Initiator Port.
 114                  */
 115                 if (unpacked_lun != 0) {
 116                         se_cmd->scsi_sense_reason = TCM_NON_EXISTENT_LUN;
 117                         se_cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION;
 118                         pr_err("TARGET_CORE[%s]: Detected NON_EXISTENT_LUN"
 119                                 " Access for 0x%08x\n",
 120                                 se_cmd->se_tfo->get_fabric_name(),
 121                                 unpacked_lun);
 122                         return -ENODEV;
 123                 }
 124                 /*
 125                  * Force WRITE PROTECT for virtual LUN 0
 126                  */
 127                 if ((se_cmd->data_direction != DMA_FROM_DEVICE) &&
 128                     (se_cmd->data_direction != DMA_NONE)) {
 129                         se_cmd->scsi_sense_reason = TCM_WRITE_PROTECTED;
 130                         se_cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION;
 131                         return -EACCES;
 132                 }
 133
 134                 se_lun = &se_sess->se_tpg->tpg_virt_lun0;
 135                 se_cmd->se_lun = &se_sess->se_tpg->tpg_virt_lun0;
 136                 se_cmd->orig_fe_lun = 0;
 137                 se_cmd->se_cmd_flags |= SCF_SE_LUN_CMD;
 138         }
 139         /*
 140          * Determine if the struct se_lun is online.
 141          * FIXME: Check for LUN_RESET + UNIT Attention
 142          */
 143         if (se_dev_check_online(se_lun->lun_se_dev) != 0) {
 144                 se_cmd->scsi_sense_reason = TCM_NON_EXISTENT_LUN;
 145                 se_cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION;
 146                 return -ENODEV;
 147         }
 148
 149         /* Directly associate cmd with se_dev */
 150         se_cmd->se_dev = se_lun->lun_se_dev;
 151
 152         /* TODO: get rid of this and use atomics for stats */
 153         dev = se_lun->lun_se_dev;
 154         spin_lock_irqsave(&dev->stats_lock, flags);
 155         dev->num_cmds++;
 156         if (se_cmd->data_direction == DMA_TO_DEVICE)
 157                 dev->write_bytes += se_cmd->data_length;
 158         else if (se_cmd->data_direction == DMA_FROM_DEVICE)
 159                 dev->read_bytes += se_cmd->data_length;
 160         spin_unlock_irqrestore(&dev->stats_lock, flags);
 161
 162         spin_lock_irqsave(&se_lun->lun_cmd_lock, flags);
 163         list_add_tail(&se_cmd->se_lun_node, &se_lun->lun_cmd_list);
 164         spin_unlock_irqrestore(&se_lun->lun_cmd_lock, flags);
 165
 166         return 0;
 167 }
 168 EXPORT_SYMBOL(transport_lookup_cmd_lun);
 169
 170 int transport_lookup_tmr_lun(struct se_cmd *se_cmd, u32 unpacked_lun)
 171 {
 172         struct se_dev_entry *deve;
 173         struct se_lun *se_lun = NULL;
 174         struct se_session *se_sess = se_cmd->se_sess;
 175         struct se_tmr_req *se_tmr = se_cmd->se_tmr_req;
 176         unsigned long flags;
 177
 178         if (unpacked_lun >= TRANSPORT_MAX_LUNS_PER_TPG) {
 179                 se_cmd->scsi_sense_reason = TCM_NON_EXISTENT_LUN;
 180                 se_cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION;
 181                 return -ENODEV;
 182         }
 183
 184         spin_lock_irqsave(&se_sess->se_node_acl->device_list_lock, flags);
 185         se_cmd->se_deve = &se_sess->se_node_acl->device_list[unpacked_lun];
 186         deve = se_cmd->se_deve;
 187
 188         if (deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS) {
 189                 se_tmr->tmr_lun = deve->se_lun;
 190                 se_cmd->se_lun = deve->se_lun;
 191                 se_lun = deve->se_lun;
 192                 se_cmd->pr_res_key = deve->pr_res_key;
 193                 se_cmd->orig_fe_lun = unpacked_lun;
 194         }
 195         spin_unlock_irqrestore(&se_sess->se_node_acl->device_list_lock, flags);
 196
 197         if (!se_lun) {
 198                 pr_debug("TARGET_CORE[%s]: Detected NON_EXISTENT_LUN"
 199                         " Access for 0x%08x\n",
 200                         se_cmd->se_tfo->get_fabric_name(),
 201                         unpacked_lun);
 202                 se_cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION;
 203                 return -ENODEV;
 204         }
 205         /*
 206          * Determine if the struct se_lun is online.
 207          * FIXME: Check for LUN_RESET + UNIT Attention
 208          */
 209         if (se_dev_check_online(se_lun->lun_se_dev) != 0) {
 210                 se_cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION;
 211                 return -ENODEV;
 212         }
 213
 214         /* Directly associate cmd with se_dev */
 215         se_cmd->se_dev = se_lun->lun_se_dev;
 216         se_tmr->tmr_dev = se_lun->lun_se_dev;
 217
 218         spin_lock_irqsave(&se_tmr->tmr_dev->se_tmr_lock, flags);
 219         list_add_tail(&se_tmr->tmr_list, &se_tmr->tmr_dev->dev_tmr_list);
 220         spin_unlock_irqrestore(&se_tmr->tmr_dev->se_tmr_lock, flags);
 221
 222         return 0;
 223 }
 224 EXPORT_SYMBOL(transport_lookup_tmr_lun);
 225
 226 /*
 227  * This function is called from core_scsi3_emulate_pro_register_and_move()
 228  * and core_scsi3_decode_spec_i_port(), and will increment &deve->pr_ref_count
 229  * when a matching rtpi is found.
 230  */
 231 struct se_dev_entry *core_get_se_deve_from_rtpi(
 232         struct se_node_acl *nacl,
 233         u16 rtpi)
 234 {
 235         struct se_dev_entry *deve;
 236         struct se_lun *lun;
 237         struct se_port *port;
 238         struct se_portal_group *tpg = nacl->se_tpg;
 239         u32 i;
 240
 241         spin_lock_irq(&nacl->device_list_lock);
 242         for (i = 0; i < TRANSPORT_MAX_LUNS_PER_TPG; i++) {
 243                 deve = &nacl->device_list[i];
 244
 245                 if (!(deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS))
 246                         continue;
 247
 248                 lun = deve->se_lun;
 249                 if (!lun) {
 250                         pr_err("%s device entries device pointer is"
 251                                 " NULL, but Initiator has access.\n",
 252                                 tpg->se_tpg_tfo->get_fabric_name());
 253                         continue;
 254                 }
 255                 port = lun->lun_sep;
 256                 if (!port) {
 257                         pr_err("%s device entries device pointer is"
 258                                 " NULL, but Initiator has access.\n",
 259                                 tpg->se_tpg_tfo->get_fabric_name());
 260                         continue;
 261                 }
 262                 if (port->sep_rtpi != rtpi)
 263                         continue;
 264
 265                 atomic_inc(&deve->pr_ref_count);
 266                 smp_mb__after_atomic_inc();
 267                 spin_unlock_irq(&nacl->device_list_lock);
 268
 269                 return deve;
 270         }
 271         spin_unlock_irq(&nacl->device_list_lock);
 272
 273         return NULL;
 274 }
 275
 276 int core_free_device_list_for_node(
 277         struct se_node_acl *nacl,
 278         struct se_portal_group *tpg)
 279 {
 280         struct se_dev_entry *deve;
 281         struct se_lun *lun;
 282         u32 i;
 283
 284         if (!nacl->device_list)
 285                 return 0;
 286
 287         spin_lock_irq(&nacl->device_list_lock);
 288         for (i = 0; i < TRANSPORT_MAX_LUNS_PER_TPG; i++) {
 289                 deve = &nacl->device_list[i];
 290
 291                 if (!(deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS))
 292                         continue;
 293
 294                 if (!deve->se_lun) {
 295                         pr_err("%s device entries device pointer is"
 296                                 " NULL, but Initiator has access.\n",
 297                                 tpg->se_tpg_tfo->get_fabric_name());
 298                         continue;
 299                 }
 300                 lun = deve->se_lun;
 301
 302                 spin_unlock_irq(&nacl->device_list_lock);
 303                 core_update_device_list_for_node(lun, NULL, deve->mapped_lun,
 304                         TRANSPORT_LUNFLAGS_NO_ACCESS, nacl, tpg, 0);
 305                 spin_lock_irq(&nacl->device_list_lock);
 306         }
 307         spin_unlock_irq(&nacl->device_list_lock);
 308
 309         kfree(nacl->device_list);
 310         nacl->device_list = NULL;
 311
 312         return 0;
 313 }
 314
 315 void core_dec_lacl_count(struct se_node_acl *se_nacl, struct se_cmd *se_cmd)
 316 {
 317         struct se_dev_entry *deve;
 318         unsigned long flags;
 319
 320         spin_lock_irqsave(&se_nacl->device_list_lock, flags);
 321         deve = &se_nacl->device_list[se_cmd->orig_fe_lun];
 322         deve->deve_cmds--;
 323         spin_unlock_irqrestore(&se_nacl->device_list_lock, flags);
 324 }
 325
 326 void core_update_device_list_access(
 327         u32 mapped_lun,
 328         u32 lun_access,
 329         struct se_node_acl *nacl)
 330 {
 331         struct se_dev_entry *deve;
 332
 333         spin_lock_irq(&nacl->device_list_lock);
 334         deve = &nacl->device_list[mapped_lun];
 335         if (lun_access & TRANSPORT_LUNFLAGS_READ_WRITE) {
 336                 deve->lun_flags &= ~TRANSPORT_LUNFLAGS_READ_ONLY;
 337                 deve->lun_flags |= TRANSPORT_LUNFLAGS_READ_WRITE;
 338         } else {
 339                 deve->lun_flags &= ~TRANSPORT_LUNFLAGS_READ_WRITE;
 340                 deve->lun_flags |= TRANSPORT_LUNFLAGS_READ_ONLY;
 341         }
 342         spin_unlock_irq(&nacl->device_list_lock);
 343 }
 344
 345 /*      core_update_device_list_for_node():
 346  *
 347  *
 348  */
 349 int core_update_device_list_for_node(
 350         struct se_lun *lun,
 351         struct se_lun_acl *lun_acl,
 352         u32 mapped_lun,
 353         u32 lun_access,
 354         struct se_node_acl *nacl,
 355         struct se_portal_group *tpg,
 356         int enable)
 357 {
 358         struct se_port *port = lun->lun_sep;
 359         struct se_dev_entry *deve = &nacl->device_list[mapped_lun];
 360         int trans = 0;
 361         /*
 362          * If the MappedLUN entry is being disabled, the entry in
 363          * port->sep_alua_list must be removed now before clearing the
 364          * struct se_dev_entry pointers below as logic in
 365          * core_alua_do_transition_tg_pt() depends on these being present.
 366          */
 367         if (!enable) {
 368                 /*
 369                  * deve->se_lun_acl will be NULL for demo-mode created LUNs
 370                  * that have not been explicitly concerted to MappedLUNs ->
 371                  * struct se_lun_acl, but we remove deve->alua_port_list from
 372                  * port->sep_alua_list. This also means that active UAs and
 373                  * NodeACL context specific PR metadata for demo-mode
 374                  * MappedLUN *deve will be released below..
 375                  */
 376                 spin_lock_bh(&port->sep_alua_lock);
 377                 list_del(&deve->alua_port_list);
 378                 spin_unlock_bh(&port->sep_alua_lock);
 379         }
 380
 381         spin_lock_irq(&nacl->device_list_lock);
 382         if (enable) {
 383                 /*
 384                  * Check if the call is handling demo mode -> explict LUN ACL
 385                  * transition.  This transition must be for the same struct se_lun
 386                  * + mapped_lun that was setup in demo mode..
 387                  */
 388                 if (deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS) {
 389                         if (deve->se_lun_acl != NULL) {
 390                                 pr_err("struct se_dev_entry->se_lun_acl"
 391                                         " already set for demo mode -> explict"
 392                                         " LUN ACL transition\n");
 393                                 spin_unlock_irq(&nacl->device_list_lock);
 394                                 return -EINVAL;
 395                         }
 396                         if (deve->se_lun != lun) {
 397                                 pr_err("struct se_dev_entry->se_lun does"
 398                                         " match passed struct se_lun for demo mode"
 399                                         " -> explict LUN ACL transition\n");
 400                                 spin_unlock_irq(&nacl->device_list_lock);
 401                                 return -EINVAL;
 402                         }
 403                         deve->se_lun_acl = lun_acl;
 404                         trans = 1;
 405                 } else {
 406                         deve->se_lun = lun;
 407                         deve->se_lun_acl = lun_acl;
 408                         deve->mapped_lun = mapped_lun;
 409                         deve->lun_flags |= TRANSPORT_LUNFLAGS_INITIATOR_ACCESS;
 410                 }
 411
 412                 if (lun_access & TRANSPORT_LUNFLAGS_READ_WRITE) {
 413                         deve->lun_flags &= ~TRANSPORT_LUNFLAGS_READ_ONLY;
 414                         deve->lun_flags |= TRANSPORT_LUNFLAGS_READ_WRITE;
 415                 } else {
 416                         deve->lun_flags &= ~TRANSPORT_LUNFLAGS_READ_WRITE;
 417                         deve->lun_flags |= TRANSPORT_LUNFLAGS_READ_ONLY;
 418                 }
 419
 420                 if (trans) {
 421                         spin_unlock_irq(&nacl->device_list_lock);
 422                         return 0;
 423                 }
 424                 deve->creation_time = get_jiffies_64();
 425                 deve->attach_count++;
 426                 spin_unlock_irq(&nacl->device_list_lock);
 427
 428                 spin_lock_bh(&port->sep_alua_lock);
 429                 list_add_tail(&deve->alua_port_list, &port->sep_alua_list);
 430                 spin_unlock_bh(&port->sep_alua_lock);
 431
 432                 return 0;
 433         }
 434         /*
 435          * Wait for any in process SPEC_I_PT=1 or REGISTER_AND_MOVE
 436          * PR operation to complete.
 437          */
 438         spin_unlock_irq(&nacl->device_list_lock);
 439         while (atomic_read(&deve->pr_ref_count) != 0)
 440                 cpu_relax();
 441         spin_lock_irq(&nacl->device_list_lock);
 442         /*
 443          * Disable struct se_dev_entry LUN ACL mapping
 444          */
 445         core_scsi3_ua_release_all(deve);
 446         deve->se_lun = NULL;
 447         deve->se_lun_acl = NULL;
 448         deve->lun_flags = 0;
 449         deve->creation_time = 0;
 450         deve->attach_count--;
 451         spin_unlock_irq(&nacl->device_list_lock);
 452
 453         core_scsi3_free_pr_reg_from_nacl(lun->lun_se_dev, nacl);
 454         return 0;
 455 }
 456
 457 /*      core_clear_lun_from_tpg():
 458  *
 459  *
 460  */
 461 void core_clear_lun_from_tpg(struct se_lun *lun, struct se_portal_group *tpg)
 462 {
 463         struct se_node_acl *nacl;
 464         struct se_dev_entry *deve;
 465         u32 i;
 466
 467         spin_lock_irq(&tpg->acl_node_lock);
 468         list_for_each_entry(nacl, &tpg->acl_node_list, acl_list) {
 469                 spin_unlock_irq(&tpg->acl_node_lock);
 470
 471                 spin_lock_irq(&nacl->device_list_lock);
 472                 for (i = 0; i < TRANSPORT_MAX_LUNS_PER_TPG; i++) {
 473                         deve = &nacl->device_list[i];
 474                         if (lun != deve->se_lun)
 475                                 continue;
 476                         spin_unlock_irq(&nacl->device_list_lock);
 477
 478                         core_update_device_list_for_node(lun, NULL,
 479                                 deve->mapped_lun, TRANSPORT_LUNFLAGS_NO_ACCESS,
 480                                 nacl, tpg, 0);
 481
 482                         spin_lock_irq(&nacl->device_list_lock);
 483                 }
 484                 spin_unlock_irq(&nacl->device_list_lock);
 485
 486                 spin_lock_irq(&tpg->acl_node_lock);
 487         }
 488         spin_unlock_irq(&tpg->acl_node_lock);
 489 }
 490
 491 static struct se_port *core_alloc_port(struct se_device *dev)
 492 {
 493         struct se_port *port, *port_tmp;
 494
 495         port = kzalloc(sizeof(struct se_port), GFP_KERNEL);
 496         if (!port) {
 497                 pr_err("Unable to allocate struct se_port\n");
 498                 return ERR_PTR(-ENOMEM);
 499         }
 500         INIT_LIST_HEAD(&port->sep_alua_list);
 501         INIT_LIST_HEAD(&port->sep_list);
 502         atomic_set(&port->sep_tg_pt_secondary_offline, 0);
 503         spin_lock_init(&port->sep_alua_lock);
 504         mutex_init(&port->sep_tg_pt_md_mutex);
 505
 506         spin_lock(&dev->se_port_lock);
 507         if (dev->dev_port_count == 0x0000ffff) {
 508                 pr_warn("Reached dev->dev_port_count =="
 509                                 " 0x0000ffff\n");
 510                 spin_unlock(&dev->se_port_lock);
 511                 return ERR_PTR(-ENOSPC);
 512         }
 513 again:
 514         /*
 515          * Allocate the next RELATIVE TARGET PORT IDENTIFER for this struct se_device
 516          * Here is the table from spc4r17 section 7.7.3.8.
 517          *
 518          *    Table 473 -- RELATIVE TARGET PORT IDENTIFIER field
 519          *
 520          * Code      Description
 521          * 0h        Reserved
 522          * 1h        Relative port 1, historically known as port A
 523          * 2h        Relative port 2, historically known as port B
 524          * 3h to FFFFh    Relative port 3 through 65 535
 525          */
 526         port->sep_rtpi = dev->dev_rpti_counter++;
 527         if (!port->sep_rtpi)
 528                 goto again;
 529
 530         list_for_each_entry(port_tmp, &dev->dev_sep_list, sep_list) {
 531                 /*
 532                  * Make sure RELATIVE TARGET PORT IDENTIFER is unique
 533                  * for 16-bit wrap..
 534                  */
 535                 if (port->sep_rtpi == port_tmp->sep_rtpi)
 536                         goto again;
 537         }
 538         spin_unlock(&dev->se_port_lock);
 539
 540         return port;
 541 }
 542
 543 static void core_export_port(
 544         struct se_device *dev,
 545         struct se_portal_group *tpg,
 546         struct se_port *port,
 547         struct se_lun *lun)
 548 {
 549         struct se_subsystem_dev *su_dev = dev->se_sub_dev;
 550         struct t10_alua_tg_pt_gp_member *tg_pt_gp_mem = NULL;
 551
 552         spin_lock(&dev->se_port_lock);
 553         spin_lock(&lun->lun_sep_lock);
 554         port->sep_tpg = tpg;
 555         port->sep_lun = lun;
 556         lun->lun_sep = port;
 557         spin_unlock(&lun->lun_sep_lock);
 558
 559         list_add_tail(&port->sep_list, &dev->dev_sep_list);
 560         spin_unlock(&dev->se_port_lock);
 561
 562         if (su_dev->t10_alua.alua_type == SPC3_ALUA_EMULATED) {
 563                 tg_pt_gp_mem = core_alua_allocate_tg_pt_gp_mem(port);
 564                 if (IS_ERR(tg_pt_gp_mem) || !tg_pt_gp_mem) {
 565                         pr_err("Unable to allocate t10_alua_tg_pt"
 566                                         "_gp_member_t\n");
 567                         return;
 568                 }
 569                 spin_lock(&tg_pt_gp_mem->tg_pt_gp_mem_lock);
 570                 __core_alua_attach_tg_pt_gp_mem(tg_pt_gp_mem,
 571                         su_dev->t10_alua.default_tg_pt_gp);
 572                 spin_unlock(&tg_pt_gp_mem->tg_pt_gp_mem_lock);
 573                 pr_debug("%s/%s: Adding to default ALUA Target Port"
 574                         " Group: alua/default_tg_pt_gp\n",
 575                         dev->transport->name, tpg->se_tpg_tfo->get_fabric_name());
 576         }
 577
 578         dev->dev_port_count++;
 579         port->sep_index = port->sep_rtpi; /* RELATIVE TARGET PORT IDENTIFER */
 580 }
 581
 582 /*
 583  *      Called with struct se_device->se_port_lock spinlock held.
 584  */
 585 static void core_release_port(struct se_device *dev, struct se_port *port)
 586         __releases(&dev->se_port_lock) __acquires(&dev->se_port_lock)
 587 {
 588         /*
 589          * Wait for any port reference for PR ALL_TG_PT=1 operation
 590          * to complete in __core_scsi3_alloc_registration()
 591          */
 592         spin_unlock(&dev->se_port_lock);
 593         if (atomic_read(&port->sep_tg_pt_ref_cnt))
 594                 cpu_relax();
 595         spin_lock(&dev->se_port_lock);
 596
 597         core_alua_free_tg_pt_gp_mem(port);
 598
 599         list_del(&port->sep_list);
 600         dev->dev_port_count--;
 601         kfree(port);
 602 }
 603
 604 int core_dev_export(
 605         struct se_device *dev,
 606         struct se_portal_group *tpg,
 607         struct se_lun *lun)
 608 {
 609         struct se_port *port;
 610
 611         port = core_alloc_port(dev);
 612         if (IS_ERR(port))
 613                 return PTR_ERR(port);
 614
 615         lun->lun_se_dev = dev;
 616         se_dev_start(dev);
 617
 618         atomic_inc(&dev->dev_export_obj.obj_access_count);
 619         core_export_port(dev, tpg, port, lun);
 620         return 0;
 621 }
 622
 623 void core_dev_unexport(
 624         struct se_device *dev,
 625         struct se_portal_group *tpg,
 626         struct se_lun *lun)
 627 {
 628         struct se_port *port = lun->lun_sep;
 629
 630         spin_lock(&lun->lun_sep_lock);
 631         if (lun->lun_se_dev == NULL) {
 632                 spin_unlock(&lun->lun_sep_lock);
 633                 return;
 634         }
 635         spin_unlock(&lun->lun_sep_lock);
 636
 637         spin_lock(&dev->se_port_lock);
 638         atomic_dec(&dev->dev_export_obj.obj_access_count);
 639         core_release_port(dev, port);
 640         spin_unlock(&dev->se_port_lock);
 641
 642         se_dev_stop(dev);
 643         lun->lun_se_dev = NULL;
 644 }
 645
 646 int target_report_luns(struct se_task *se_task)
 647 {
 648         struct se_cmd *se_cmd = se_task->task_se_cmd;
 649         struct se_dev_entry *deve;
 650         struct se_lun *se_lun;
 651         struct se_session *se_sess = se_cmd->se_sess;
 652         unsigned char *buf;
 653         u32 lun_count = 0, offset = 8, i;
 654
 655         buf = transport_kmap_data_sg(se_cmd);
 656         if (!buf)
 657                 return -ENOMEM;
 658
 659         /*
 660          * If no struct se_session pointer is present, this struct se_cmd is
 661          * coming via a target_core_mod PASSTHROUGH op, and not through
 662          * a $FABRIC_MOD.  In that case, report LUN=0 only.
 663          */
 664         if (!se_sess) {
 665                 int_to_scsilun(0, (struct scsi_lun *)&buf[offset]);
 666                 lun_count = 1;
 667                 goto done;
 668         }
 669
 670         spin_lock_irq(&se_sess->se_node_acl->device_list_lock);
 671         for (i = 0; i < TRANSPORT_MAX_LUNS_PER_TPG; i++) {
 672                 deve = &se_sess->se_node_acl->device_list[i];
 673                 if (!(deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS))
 674                         continue;
 675                 se_lun = deve->se_lun;
 676                 /*
 677                  * We determine the correct LUN LIST LENGTH even once we
 678                  * have reached the initial allocation length.
 679                  * See SPC2-R20 7.19.
 680                  */
 681                 lun_count++;
 682                 if ((offset + 8) > se_cmd->data_length)
 683                         continue;
 684
 685                 int_to_scsilun(deve->mapped_lun, (struct scsi_lun *)&buf[offset]);
 686                 offset += 8;
 687         }
 688         spin_unlock_irq(&se_sess->se_node_acl->device_list_lock);
 689
 690         /*
 691          * See SPC3 r07, page 159.
 692          */
 693 done:
 694         lun_count *= 8;
 695         buf[0] = ((lun_count >> 24) & 0xff);
 696         buf[1] = ((lun_count >> 16) & 0xff);
 697         buf[2] = ((lun_count >> 8) & 0xff);
 698         buf[3] = (lun_count & 0xff);
 699         transport_kunmap_data_sg(se_cmd);
 700
 701         se_task->task_scsi_status = GOOD;
 702         transport_complete_task(se_task, 1);
 703         return 0;
 704 }
 705
 706 /*      se_release_device_for_hba():
 707  *
 708  *
 709  */
 710 void se_release_device_for_hba(struct se_device *dev)
 711 {
 712         struct se_hba *hba = dev->se_hba;
 713
 714         if ((dev->dev_status & TRANSPORT_DEVICE_ACTIVATED) ||
 715             (dev->dev_status & TRANSPORT_DEVICE_DEACTIVATED) ||
 716             (dev->dev_status & TRANSPORT_DEVICE_SHUTDOWN) ||
 717             (dev->dev_status & TRANSPORT_DEVICE_OFFLINE_ACTIVATED) ||
 718             (dev->dev_status & TRANSPORT_DEVICE_OFFLINE_DEACTIVATED))
 719                 se_dev_stop(dev);
 720
 721         if (dev->dev_ptr) {
 722                 kthread_stop(dev->process_thread);
 723                 if (dev->transport->free_device)
 724                         dev->transport->free_device(dev->dev_ptr);
 725         }
 726
 727         spin_lock(&hba->device_lock);
 728         list_del(&dev->dev_list);
 729         hba->dev_count--;
 730         spin_unlock(&hba->device_lock);
 731
 732         core_scsi3_free_all_registrations(dev);
 733         se_release_vpd_for_dev(dev);
 734
 735         kfree(dev);
 736 }
 737
 738 void se_release_vpd_for_dev(struct se_device *dev)
 739 {
 740         struct t10_vpd *vpd, *vpd_tmp;
 741
 742         spin_lock(&dev->se_sub_dev->t10_wwn.t10_vpd_lock);
 743         list_for_each_entry_safe(vpd, vpd_tmp,
 744                         &dev->se_sub_dev->t10_wwn.t10_vpd_list, vpd_list) {
 745                 list_del(&vpd->vpd_list);
 746                 kfree(vpd);
 747         }
 748         spin_unlock(&dev->se_sub_dev->t10_wwn.t10_vpd_lock);
 749 }
 750
 751 /*      se_free_virtual_device():
 752  *
 753  *      Used for IBLOCK, RAMDISK, and FILEIO Transport Drivers.
 754  */
 755 int se_free_virtual_device(struct se_device *dev, struct se_hba *hba)
 756 {
 757         if (!list_empty(&dev->dev_sep_list))
 758                 dump_stack();
 759
 760         core_alua_free_lu_gp_mem(dev);
 761         se_release_device_for_hba(dev);
 762
 763         return 0;
 764 }
 765
 766 static void se_dev_start(struct se_device *dev)
 767 {
 768         struct se_hba *hba = dev->se_hba;
 769
 770         spin_lock(&hba->device_lock);
 771         atomic_inc(&dev->dev_obj.obj_access_count);
 772         if (atomic_read(&dev->dev_obj.obj_access_count) == 1) {
 773                 if (dev->dev_status & TRANSPORT_DEVICE_DEACTIVATED) {
 774                         dev->dev_status &= ~TRANSPORT_DEVICE_DEACTIVATED;
 775                         dev->dev_status |= TRANSPORT_DEVICE_ACTIVATED;
 776                 } else if (dev->dev_status &
 777                            TRANSPORT_DEVICE_OFFLINE_DEACTIVATED) {
 778                         dev->dev_status &=
 779                                 ~TRANSPORT_DEVICE_OFFLINE_DEACTIVATED;
 780                         dev->dev_status |= TRANSPORT_DEVICE_OFFLINE_ACTIVATED;
 781                 }
 782         }
 783         spin_unlock(&hba->device_lock);
 784 }
 785
 786 static void se_dev_stop(struct se_device *dev)
 787 {
 788         struct se_hba *hba = dev->se_hba;
 789
 790         spin_lock(&hba->device_lock);
 791         atomic_dec(&dev->dev_obj.obj_access_count);
 792         if (atomic_read(&dev->dev_obj.obj_access_count) == 0) {
 793                 if (dev->dev_status & TRANSPORT_DEVICE_ACTIVATED) {
 794                         dev->dev_status &= ~TRANSPORT_DEVICE_ACTIVATED;
 795                         dev->dev_status |= TRANSPORT_DEVICE_DEACTIVATED;
 796                 } else if (dev->dev_status &
 797                            TRANSPORT_DEVICE_OFFLINE_ACTIVATED) {
 798                         dev->dev_status &= ~TRANSPORT_DEVICE_OFFLINE_ACTIVATED;
 799                         dev->dev_status |= TRANSPORT_DEVICE_OFFLINE_DEACTIVATED;
 800                 }
 801         }
 802         spin_unlock(&hba->device_lock);
 803 }
 804
 805 int se_dev_check_online(struct se_device *dev)
 806 {
 807         unsigned long flags;
 808         int ret;
 809
 810         spin_lock_irqsave(&dev->dev_status_lock, flags);
 811         ret = ((dev->dev_status & TRANSPORT_DEVICE_ACTIVATED) ||
 812                (dev->dev_status & TRANSPORT_DEVICE_DEACTIVATED)) ? 0 : 1;
 813         spin_unlock_irqrestore(&dev->dev_status_lock, flags);
 814
 815         return ret;
 816 }
 817
 818 int se_dev_check_shutdown(struct se_device *dev)
 819 {
 820         int ret;
 821
 822         spin_lock_irq(&dev->dev_status_lock);
 823         ret = (dev->dev_status & TRANSPORT_DEVICE_SHUTDOWN);
 824         spin_unlock_irq(&dev->dev_status_lock);
 825
 826         return ret;
 827 }
 828
 829 u32 se_dev_align_max_sectors(u32 max_sectors, u32 block_size)
 830 {
 831         u32 tmp, aligned_max_sectors;
 832         /*
 833          * Limit max_sectors to a PAGE_SIZE aligned value for modern
 834          * transport_allocate_data_tasks() operation.
 835          */
 836         tmp = rounddown((max_sectors * block_size), PAGE_SIZE);
 837         aligned_max_sectors = (tmp / block_size);
 838         if (max_sectors != aligned_max_sectors) {
 839                 printk(KERN_INFO "Rounding down aligned max_sectors from %u"
 840                                 " to %u\n", max_sectors, aligned_max_sectors);
 841                 return aligned_max_sectors;
 842         }
 843
 844         return max_sectors;
 845 }
 846
 847 void se_dev_set_default_attribs(
 848         struct se_device *dev,
 849         struct se_dev_limits *dev_limits)
 850 {
 851         struct queue_limits *limits = &dev_limits->limits;
 852
 853         dev->se_sub_dev->se_dev_attrib.emulate_dpo = DA_EMULATE_DPO;
 854         dev->se_sub_dev->se_dev_attrib.emulate_fua_write = DA_EMULATE_FUA_WRITE;
 855         dev->se_sub_dev->se_dev_attrib.emulate_fua_read = DA_EMULATE_FUA_READ;
 856         dev->se_sub_dev->se_dev_attrib.emulate_write_cache = DA_EMULATE_WRITE_CACHE;
 857         dev->se_sub_dev->se_dev_attrib.emulate_ua_intlck_ctrl = DA_EMULATE_UA_INTLLCK_CTRL;
 858         dev->se_sub_dev->se_dev_attrib.emulate_tas = DA_EMULATE_TAS;
 859         dev->se_sub_dev->se_dev_attrib.emulate_tpu = DA_EMULATE_TPU;
 860         dev->se_sub_dev->se_dev_attrib.emulate_tpws = DA_EMULATE_TPWS;
 861         dev->se_sub_dev->se_dev_attrib.emulate_reservations = DA_EMULATE_RESERVATIONS;
 862         dev->se_sub_dev->se_dev_attrib.emulate_alua = DA_EMULATE_ALUA;
 863         dev->se_sub_dev->se_dev_attrib.enforce_pr_isids = DA_ENFORCE_PR_ISIDS;
 864         dev->se_sub_dev->se_dev_attrib.is_nonrot = DA_IS_NONROT;
 865         dev->se_sub_dev->se_dev_attrib.emulate_rest_reord = DA_EMULATE_REST_REORD;
 866         /*
 867          * The TPU=1 and TPWS=1 settings will be set in TCM/IBLOCK
 868          * iblock_create_virtdevice() from struct queue_limits values
 869          * if blk_queue_discard()==1
 870          */
 871         dev->se_sub_dev->se_dev_attrib.max_unmap_lba_count = DA_MAX_UNMAP_LBA_COUNT;
 872         dev->se_sub_dev->se_dev_attrib.max_unmap_block_desc_count =
 873                 DA_MAX_UNMAP_BLOCK_DESC_COUNT;
 874         dev->se_sub_dev->se_dev_attrib.unmap_granularity = DA_UNMAP_GRANULARITY_DEFAULT;
 875         dev->se_sub_dev->se_dev_attrib.unmap_granularity_alignment =
 876                                 DA_UNMAP_GRANULARITY_ALIGNMENT_DEFAULT;
 877         /*
 878          * block_size is based on subsystem plugin dependent requirements.
 879          */
 880         dev->se_sub_dev->se_dev_attrib.hw_block_size = limits->logical_block_size;
 881         dev->se_sub_dev->se_dev_attrib.block_size = limits->logical_block_size;
 882         /*
 883          * max_sectors is based on subsystem plugin dependent requirements.
 884          */
 885         dev->se_sub_dev->se_dev_attrib.hw_max_sectors = limits->max_hw_sectors;
 886         /*
 887          * Align max_sectors down to PAGE_SIZE to follow transport_allocate_data_tasks()
 888          */
 889         limits->max_sectors = se_dev_align_max_sectors(limits->max_sectors,
 890                                                 limits->logical_block_size);
 891         dev->se_sub_dev->se_dev_attrib.max_sectors = limits->max_sectors;
 892         /*
 893          * Set fabric_max_sectors, which is reported in block limits
 894          * VPD page (B0h).
 895          */
 896         dev->se_sub_dev->se_dev_attrib.fabric_max_sectors = DA_FABRIC_MAX_SECTORS;
 897         /*
 898          * Set optimal_sectors from fabric_max_sectors, which can be
 899          * lowered via configfs.
 900          */
 901         dev->se_sub_dev->se_dev_attrib.optimal_sectors = DA_FABRIC_MAX_SECTORS;
 902         /*
 903          * queue_depth is based on subsystem plugin dependent requirements.
 904          */
 905         dev->se_sub_dev->se_dev_attrib.hw_queue_depth = dev_limits->hw_queue_depth;
 906         dev->se_sub_dev->se_dev_attrib.queue_depth = dev_limits->queue_depth;
 907 }
 908
 909 int se_dev_set_max_unmap_lba_count(
 910         struct se_device *dev,
 911         u32 max_unmap_lba_count)
 912 {
 913         dev->se_sub_dev->se_dev_attrib.max_unmap_lba_count = max_unmap_lba_count;
 914         pr_debug("dev[%p]: Set max_unmap_lba_count: %u\n",
 915                         dev, dev->se_sub_dev->se_dev_attrib.max_unmap_lba_count);
 916         return 0;
 917 }
 918
 919 int se_dev_set_max_unmap_block_desc_count(
 920         struct se_device *dev,
 921         u32 max_unmap_block_desc_count)
 922 {
 923         dev->se_sub_dev->se_dev_attrib.max_unmap_block_desc_count =
 924                 max_unmap_block_desc_count;
 925         pr_debug("dev[%p]: Set max_unmap_block_desc_count: %u\n",
 926                         dev, dev->se_sub_dev->se_dev_attrib.max_unmap_block_desc_count);
 927         return 0;
 928 }
 929
 930 int se_dev_set_unmap_granularity(
 931         struct se_device *dev,
 932         u32 unmap_granularity)
 933 {
 934         dev->se_sub_dev->se_dev_attrib.unmap_granularity = unmap_granularity;
 935         pr_debug("dev[%p]: Set unmap_granularity: %u\n",
 936                         dev, dev->se_sub_dev->se_dev_attrib.unmap_granularity);
 937         return 0;
 938 }
 939
 940 int se_dev_set_unmap_granularity_alignment(
 941         struct se_device *dev,
 942         u32 unmap_granularity_alignment)
 943 {
 944         dev->se_sub_dev->se_dev_attrib.unmap_granularity_alignment = unmap_granularity_alignment;
 945         pr_debug("dev[%p]: Set unmap_granularity_alignment: %u\n",
 946                         dev, dev->se_sub_dev->se_dev_attrib.unmap_granularity_alignment);
 947         return 0;
 948 }
 949
 950 int se_dev_set_emulate_dpo(struct se_device *dev, int flag)
 951 {
 952         if (flag != 0 && flag != 1) {
 953                 pr_err("Illegal value %d\n", flag);
 954                 return -EINVAL;
 955         }
 956
 957         if (flag) {
 958                 pr_err("dpo_emulated not supported\n");
 959                 return -EINVAL;
 960         }
 961
 962         return 0;
 963 }
 964
 965 int se_dev_set_emulate_fua_write(struct se_device *dev, int flag)
 966 {
 967         if (flag != 0 && flag != 1) {
 968                 pr_err("Illegal value %d\n", flag);
 969                 return -EINVAL;
 970         }
 971
 972         if (flag && dev->transport->fua_write_emulated == 0) {
 973                 pr_err("fua_write_emulated not supported\n");
 974                 return -EINVAL;
 975         }
 976         dev->se_sub_dev->se_dev_attrib.emulate_fua_write = flag;
 977         pr_debug("dev[%p]: SE Device Forced Unit Access WRITEs: %d\n",
 978                         dev, dev->se_sub_dev->se_dev_attrib.emulate_fua_write);
 979         return 0;
 980 }
 981
 982 int se_dev_set_emulate_fua_read(struct se_device *dev, int flag)
 983 {
 984         if (flag != 0 && flag != 1) {
 985                 pr_err("Illegal value %d\n", flag);
 986                 return -EINVAL;
 987         }
 988
 989         if (flag) {
 990                 pr_err("ua read emulated not supported\n");
 991                 return -EINVAL;
 992         }
 993
 994         return 0;
 995 }
 996
 997 int se_dev_set_emulate_write_cache(struct se_device *dev, int flag)
 998 {
 999         if (flag != 0 && flag != 1) {
1000                 pr_err("Illegal value %d\n", flag);
1001                 return -EINVAL;
1002         }
1003         if (flag && dev->transport->write_cache_emulated == 0) {
1004                 pr_err("write_cache_emulated not supported\n");
1005                 return -EINVAL;
1006         }
1007         dev->se_sub_dev->se_dev_attrib.emulate_write_cache = flag;
1008         pr_debug("dev[%p]: SE Device WRITE_CACHE_EMULATION flag: %d\n",
1009                         dev, dev->se_sub_dev->se_dev_attrib.emulate_write_cache);
1010         return 0;
1011 }
1012
1013 int se_dev_set_emulate_ua_intlck_ctrl(struct se_device *dev, int flag)
1014 {
1015         if ((flag != 0) && (flag != 1) && (flag != 2)) {
1016                 pr_err("Illegal value %d\n", flag);
1017                 return -EINVAL;
1018         }
1019
1020         if (atomic_read(&dev->dev_export_obj.obj_access_count)) {
1021                 pr_err("dev[%p]: Unable to change SE Device"
1022                         " UA_INTRLCK_CTRL while dev_export_obj: %d count"
1023                         " exists\n", dev,
1024                         atomic_read(&dev->dev_export_obj.obj_access_count));
1025                 return -EINVAL;
1026         }
1027         dev->se_sub_dev->se_dev_attrib.emulate_ua_intlck_ctrl = flag;
1028         pr_debug("dev[%p]: SE Device UA_INTRLCK_CTRL flag: %d\n",
1029                 dev, dev->se_sub_dev->se_dev_attrib.emulate_ua_intlck_ctrl);
1030
1031         return 0;
1032 }
1033
1034 int se_dev_set_emulate_tas(struct se_device *dev, int flag)
1035 {
1036         if ((flag != 0) && (flag != 1)) {
1037                 pr_err("Illegal value %d\n", flag);
1038                 return -EINVAL;
1039         }
1040
1041         if (atomic_read(&dev->dev_export_obj.obj_access_count)) {
1042                 pr_err("dev[%p]: Unable to change SE Device TAS while"
1043                         " dev_export_obj: %d count exists\n", dev,
1044                         atomic_read(&dev->dev_export_obj.obj_access_count));
1045                 return -EINVAL;
1046         }
1047         dev->se_sub_dev->se_dev_attrib.emulate_tas = flag;
1048         pr_debug("dev[%p]: SE Device TASK_ABORTED status bit: %s\n",
1049                 dev, (dev->se_sub_dev->se_dev_attrib.emulate_tas) ? "Enabled" : "Disabled");
1050
1051         return 0;
1052 }
1053
1054 int se_dev_set_emulate_tpu(struct se_device *dev, int flag)
1055 {
1056         if ((flag != 0) && (flag != 1)) {
1057                 pr_err("Illegal value %d\n", flag);
1058                 return -EINVAL;
1059         }
1060         /*
1061          * We expect this value to be non-zero when generic Block Layer
1062          * Discard supported is detected iblock_create_virtdevice().
1063          */
1064         if (flag && !dev->se_sub_dev->se_dev_attrib.max_unmap_block_desc_count) {
1065                 pr_err("Generic Block Discard not supported\n");
1066                 return -ENOSYS;
1067         }
1068
1069         dev->se_sub_dev->se_dev_attrib.emulate_tpu = flag;
1070         pr_debug("dev[%p]: SE Device Thin Provisioning UNMAP bit: %d\n",
1071                                 dev, flag);
1072         return 0;
1073 }
1074
1075 int se_dev_set_emulate_tpws(struct se_device *dev, int flag)
1076 {
1077         if ((flag != 0) && (flag != 1)) {
1078                 pr_err("Illegal value %d\n", flag);
1079                 return -EINVAL;
1080         }
1081         /*
1082          * We expect this value to be non-zero when generic Block Layer
1083          * Discard supported is detected iblock_create_virtdevice().
1084          */
1085         if (flag && !dev->se_sub_dev->se_dev_attrib.max_unmap_block_desc_count) {
1086                 pr_err("Generic Block Discard not supported\n");
1087                 return -ENOSYS;
1088         }
1089
1090         dev->se_sub_dev->se_dev_attrib.emulate_tpws = flag;
1091         pr_debug("dev[%p]: SE Device Thin Provisioning WRITE_SAME: %d\n",
1092                                 dev, flag);
1093         return 0;
1094 }
1095
1096 int se_dev_set_enforce_pr_isids(struct se_device *dev, int flag)
1097 {
1098         if ((flag != 0) && (flag != 1)) {
1099                 pr_err("Illegal value %d\n", flag);
1100                 return -EINVAL;
1101         }
1102         dev->se_sub_dev->se_dev_attrib.enforce_pr_isids = flag;
1103         pr_debug("dev[%p]: SE Device enforce_pr_isids bit: %s\n", dev,
1104                 (dev->se_sub_dev->se_dev_attrib.enforce_pr_isids) ? "Enabled" : "Disabled");
1105         return 0;
1106 }
1107
1108 int se_dev_set_is_nonrot(struct se_device *dev, int flag)
1109 {
1110         if ((flag != 0) && (flag != 1)) {
1111                 printk(KERN_ERR "Illegal value %d\n", flag);
1112                 return -EINVAL;
1113         }
1114         dev->se_sub_dev->se_dev_attrib.is_nonrot = flag;
1115         pr_debug("dev[%p]: SE Device is_nonrot bit: %d\n",
1116                dev, flag);
1117         return 0;
1118 }
1119
1120 int se_dev_set_emulate_rest_reord(struct se_device *dev, int flag)
1121 {
1122         if (flag != 0) {
1123                 printk(KERN_ERR "dev[%p]: SE Device emulatation of restricted"
1124                         " reordering not implemented\n", dev);
1125                 return -ENOSYS;
1126         }
1127         dev->se_sub_dev->se_dev_attrib.emulate_rest_reord = flag;
1128         pr_debug("dev[%p]: SE Device emulate_rest_reord: %d\n", dev, flag);
1129         return 0;
1130 }
1131
1132 /*
1133  * Note, this can only be called on unexported SE Device Object.
1134  */
1135 int se_dev_set_queue_depth(struct se_device *dev, u32 queue_depth)
1136 {
1137         if (atomic_read(&dev->dev_export_obj.obj_access_count)) {
1138                 pr_err("dev[%p]: Unable to change SE Device TCQ while"
1139                         " dev_export_obj: %d count exists\n", dev,
1140                         atomic_read(&dev->dev_export_obj.obj_access_count));
1141                 return -EINVAL;
1142         }
1143         if (!queue_depth) {
1144                 pr_err("dev[%p]: Illegal ZERO value for queue"
1145                         "_depth\n", dev);
1146                 return -EINVAL;
1147         }
1148
1149         if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) {
1150                 if (queue_depth > dev->se_sub_dev->se_dev_attrib.hw_queue_depth) {
1151                         pr_err("dev[%p]: Passed queue_depth: %u"
1152                                 " exceeds TCM/SE_Device TCQ: %u\n",
1153                                 dev, queue_depth,
1154                                 dev->se_sub_dev->se_dev_attrib.hw_queue_depth);
1155                         return -EINVAL;
1156                 }
1157         } else {
1158                 if (queue_depth > dev->se_sub_dev->se_dev_attrib.queue_depth) {
1159                         if (queue_depth > dev->se_sub_dev->se_dev_attrib.hw_queue_depth) {
1160                                 pr_err("dev[%p]: Passed queue_depth:"
1161                                         " %u exceeds TCM/SE_Device MAX"
1162                                         " TCQ: %u\n", dev, queue_depth,
1163                                         dev->se_sub_dev->se_dev_attrib.hw_queue_depth);
1164                                 return -EINVAL;
1165                         }
1166                 }
1167         }
1168
1169         dev->se_sub_dev->se_dev_attrib.queue_depth = dev->queue_depth = queue_depth;
1170         pr_debug("dev[%p]: SE Device TCQ Depth changed to: %u\n",
1171                         dev, queue_depth);
1172         return 0;
1173 }
1174
1175 int se_dev_set_max_sectors(struct se_device *dev, u32 max_sectors)
1176 {
1177         int force = 0; /* Force setting for VDEVS */
1178
1179         if (atomic_read(&dev->dev_export_obj.obj_access_count)) {
1180                 pr_err("dev[%p]: Unable to change SE Device"
1181                         " max_sectors while dev_export_obj: %d count exists\n",
1182                         dev, atomic_read(&dev->dev_export_obj.obj_access_count));
1183                 return -EINVAL;
1184         }
1185         if (!max_sectors) {
1186                 pr_err("dev[%p]: Illegal ZERO value for"
1187                         " max_sectors\n", dev);
1188                 return -EINVAL;
1189         }
1190         if (max_sectors < DA_STATUS_MAX_SECTORS_MIN) {
1191                 pr_err("dev[%p]: Passed max_sectors: %u less than"
1192                         " DA_STATUS_MAX_SECTORS_MIN: %u\n", dev, max_sectors,
1193                                 DA_STATUS_MAX_SECTORS_MIN);
1194                 return -EINVAL;
1195         }
1196         if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) {
1197                 if (max_sectors > dev->se_sub_dev->se_dev_attrib.hw_max_sectors) {
1198                         pr_err("dev[%p]: Passed max_sectors: %u"
1199                                 " greater than TCM/SE_Device max_sectors:"
1200                                 " %u\n", dev, max_sectors,
1201                                 dev->se_sub_dev->se_dev_attrib.hw_max_sectors);
1202                          return -EINVAL;
1203                 }
1204         } else {
1205                 if (!force && (max_sectors >
1206                                  dev->se_sub_dev->se_dev_attrib.hw_max_sectors)) {
1207                         pr_err("dev[%p]: Passed max_sectors: %u"
1208                                 " greater than TCM/SE_Device max_sectors"
1209                                 ": %u, use force=1 to override.\n", dev,
1210                                 max_sectors, dev->se_sub_dev->se_dev_attrib.hw_max_sectors);
1211                         return -EINVAL;
1212                 }
1213                 if (max_sectors > DA_STATUS_MAX_SECTORS_MAX) {
1214                         pr_err("dev[%p]: Passed max_sectors: %u"
1215                                 " greater than DA_STATUS_MAX_SECTORS_MAX:"
1216                                 " %u\n", dev, max_sectors,
1217                                 DA_STATUS_MAX_SECTORS_MAX);
1218                         return -EINVAL;
1219                 }
1220         }
1221         /*
1222          * Align max_sectors down to PAGE_SIZE to follow transport_allocate_data_tasks()
1223          */
1224         max_sectors = se_dev_align_max_sectors(max_sectors,
1225                                 dev->se_sub_dev->se_dev_attrib.block_size);
1226
1227         dev->se_sub_dev->se_dev_attrib.max_sectors = max_sectors;
1228         pr_debug("dev[%p]: SE Device max_sectors changed to %u\n",
1229                         dev, max_sectors);
1230         return 0;
1231 }
1232
1233 int se_dev_set_fabric_max_sectors(struct se_device *dev, u32 fabric_max_sectors)
1234 {
1235         if (atomic_read(&dev->dev_export_obj.obj_access_count)) {
1236                 pr_err("dev[%p]: Unable to change SE Device"
1237                         " fabric_max_sectors while dev_export_obj: %d count exists\n",
1238                         dev, atomic_read(&dev->dev_export_obj.obj_access_count));
1239                 return -EINVAL;
1240         }
1241         if (!fabric_max_sectors) {
1242                 pr_err("dev[%p]: Illegal ZERO value for"
1243                         " fabric_max_sectors\n", dev);
1244                 return -EINVAL;
1245         }
1246         if (fabric_max_sectors < DA_STATUS_MAX_SECTORS_MIN) {
1247                 pr_err("dev[%p]: Passed fabric_max_sectors: %u less than"
1248                         " DA_STATUS_MAX_SECTORS_MIN: %u\n", dev, fabric_max_sectors,
1249                                 DA_STATUS_MAX_SECTORS_MIN);
1250                 return -EINVAL;
1251         }
1252         if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) {
1253                 if (fabric_max_sectors > dev->se_sub_dev->se_dev_attrib.hw_max_sectors) {
1254                         pr_err("dev[%p]: Passed fabric_max_sectors: %u"
1255                                 " greater than TCM/SE_Device max_sectors:"
1256                                 " %u\n", dev, fabric_max_sectors,
1257                                 dev->se_sub_dev->se_dev_attrib.hw_max_sectors);
1258                          return -EINVAL;
1259                 }
1260         } else {
1261                 if (fabric_max_sectors > DA_STATUS_MAX_SECTORS_MAX) {
1262                         pr_err("dev[%p]: Passed fabric_max_sectors: %u"
1263                                 " greater than DA_STATUS_MAX_SECTORS_MAX:"
1264                                 " %u\n", dev, fabric_max_sectors,
1265                                 DA_STATUS_MAX_SECTORS_MAX);
1266                         return -EINVAL;
1267                 }
1268         }
1269         /*
1270          * Align max_sectors down to PAGE_SIZE to follow transport_allocate_data_tasks()
1271          */
1272         fabric_max_sectors = se_dev_align_max_sectors(fabric_max_sectors,
1273                                                       dev->se_sub_dev->se_dev_attrib.block_size);
1274
1275         dev->se_sub_dev->se_dev_attrib.fabric_max_sectors = fabric_max_sectors;
1276         pr_debug("dev[%p]: SE Device max_sectors changed to %u\n",
1277                         dev, fabric_max_sectors);
1278         return 0;
1279 }
1280
1281 int se_dev_set_optimal_sectors(struct se_device *dev, u32 optimal_sectors)
1282 {
1283         if (atomic_read(&dev->dev_export_obj.obj_access_count)) {
1284                 pr_err("dev[%p]: Unable to change SE Device"
1285                         " optimal_sectors while dev_export_obj: %d count exists\n",
1286                         dev, atomic_read(&dev->dev_export_obj.obj_access_count));
1287                 return -EINVAL;
1288         }
1289         if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) {
1290                 pr_err("dev[%p]: Passed optimal_sectors cannot be"
1291                                 " changed for TCM/pSCSI\n", dev);
1292                 return -EINVAL;
1293         }
1294         if (optimal_sectors > dev->se_sub_dev->se_dev_attrib.fabric_max_sectors) {
1295                 pr_err("dev[%p]: Passed optimal_sectors %u cannot be"
1296                         " greater than fabric_max_sectors: %u\n", dev,
1297                         optimal_sectors, dev->se_sub_dev->se_dev_attrib.fabric_max_sectors);
1298                 return -EINVAL;
1299         }
1300
1301         dev->se_sub_dev->se_dev_attrib.optimal_sectors = optimal_sectors;
1302         pr_debug("dev[%p]: SE Device optimal_sectors changed to %u\n",
1303                         dev, optimal_sectors);
1304         return 0;
1305 }
1306
1307 int se_dev_set_block_size(struct se_device *dev, u32 block_size)
1308 {
1309         if (atomic_read(&dev->dev_export_obj.obj_access_count)) {
1310                 pr_err("dev[%p]: Unable to change SE Device block_size"
1311                         " while dev_export_obj: %d count exists\n", dev,
1312                         atomic_read(&dev->dev_export_obj.obj_access_count));
1313                 return -EINVAL;
1314         }
1315
1316         if ((block_size != 512) &&
1317             (block_size != 1024) &&
1318             (block_size != 2048) &&
1319             (block_size != 4096)) {
1320                 pr_err("dev[%p]: Illegal value for block_device: %u"
1321                         " for SE device, must be 512, 1024, 2048 or 4096\n",
1322                         dev, block_size);
1323                 return -EINVAL;
1324         }
1325
1326         if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) {
1327                 pr_err("dev[%p]: Not allowed to change block_size for"
1328                         " Physical Device, use for Linux/SCSI to change"
1329                         " block_size for underlying hardware\n", dev);
1330                 return -EINVAL;
1331         }
1332
1333         dev->se_sub_dev->se_dev_attrib.block_size = block_size;
1334         pr_debug("dev[%p]: SE Device block_size changed to %u\n",
1335                         dev, block_size);
1336         return 0;
1337 }
1338
1339 struct se_lun *core_dev_add_lun(
1340         struct se_portal_group *tpg,
1341         struct se_hba *hba,
1342         struct se_device *dev,
1343         u32 lun)
1344 {
1345         struct se_lun *lun_p;
1346         u32 lun_access = 0;
1347         int rc;
1348
1349         if (atomic_read(&dev->dev_access_obj.obj_access_count) != 0) {
1350                 pr_err("Unable to export struct se_device while dev_access_obj: %d\n",
1351                         atomic_read(&dev->dev_access_obj.obj_access_count));
1352                 return ERR_PTR(-EACCES);
1353         }
1354
1355         lun_p = core_tpg_pre_addlun(tpg, lun);
1356         if (IS_ERR(lun_p))
1357                 return lun_p;
1358
1359         if (dev->dev_flags & DF_READ_ONLY)
1360                 lun_access = TRANSPORT_LUNFLAGS_READ_ONLY;
1361         else
1362                 lun_access = TRANSPORT_LUNFLAGS_READ_WRITE;
1363
1364         rc = core_tpg_post_addlun(tpg, lun_p, lun_access, dev);
1365         if (rc < 0)
1366                 return ERR_PTR(rc);
1367
1368         pr_debug("%s_TPG[%u]_LUN[%u] - Activated %s Logical Unit from"
1369                 " CORE HBA: %u\n", tpg->se_tpg_tfo->get_fabric_name(),
1370                 tpg->se_tpg_tfo->tpg_get_tag(tpg), lun_p->unpacked_lun,
1371                 tpg->se_tpg_tfo->get_fabric_name(), hba->hba_id);
1372         /*
1373          * Update LUN maps for dynamically added initiators when
1374          * generate_node_acl is enabled.
1375          */
1376         if (tpg->se_tpg_tfo->tpg_check_demo_mode(tpg)) {
1377                 struct se_node_acl *acl;
1378                 spin_lock_irq(&tpg->acl_node_lock);
1379                 list_for_each_entry(acl, &tpg->acl_node_list, acl_list) {
1380                         if (acl->dynamic_node_acl &&
1381                             (!tpg->se_tpg_tfo->tpg_check_demo_mode_login_only ||
1382                              !tpg->se_tpg_tfo->tpg_check_demo_mode_login_only(tpg))) {
1383                                 spin_unlock_irq(&tpg->acl_node_lock);
1384                                 core_tpg_add_node_to_devs(acl, tpg);
1385                                 spin_lock_irq(&tpg->acl_node_lock);
1386                         }
1387                 }
1388                 spin_unlock_irq(&tpg->acl_node_lock);
1389         }
1390
1391         return lun_p;
1392 }
1393
1394 /*      core_dev_del_lun():
1395  *
1396  *
1397  */
1398 int core_dev_del_lun(
1399         struct se_portal_group *tpg,
1400         u32 unpacked_lun)
1401 {
1402         struct se_lun *lun;
1403
1404         lun = core_tpg_pre_dellun(tpg, unpacked_lun);
1405         if (IS_ERR(lun))
1406                 return PTR_ERR(lun);
1407
1408         core_tpg_post_dellun(tpg, lun);
1409
1410         pr_debug("%s_TPG[%u]_LUN[%u] - Deactivated %s Logical Unit from"
1411                 " device object\n", tpg->se_tpg_tfo->get_fabric_name(),
1412                 tpg->se_tpg_tfo->tpg_get_tag(tpg), unpacked_lun,
1413                 tpg->se_tpg_tfo->get_fabric_name());
1414
1415         return 0;
1416 }
1417
1418 struct se_lun *core_get_lun_from_tpg(struct se_portal_group *tpg, u32 unpacked_lun)
1419 {
1420         struct se_lun *lun;
1421
1422         spin_lock(&tpg->tpg_lun_lock);
1423         if (unpacked_lun > (TRANSPORT_MAX_LUNS_PER_TPG-1)) {
1424                 pr_err("%s LUN: %u exceeds TRANSPORT_MAX_LUNS"
1425                         "_PER_TPG-1: %u for Target Portal Group: %hu\n",
1426                         tpg->se_tpg_tfo->get_fabric_name(), unpacked_lun,
1427                         TRANSPORT_MAX_LUNS_PER_TPG-1,
1428                         tpg->se_tpg_tfo->tpg_get_tag(tpg));
1429                 spin_unlock(&tpg->tpg_lun_lock);
1430                 return NULL;
1431         }
1432         lun = &tpg->tpg_lun_list[unpacked_lun];
1433
1434         if (lun->lun_status != TRANSPORT_LUN_STATUS_FREE) {
1435                 pr_err("%s Logical Unit Number: %u is not free on"
1436                         " Target Portal Group: %hu, ignoring request.\n",
1437                         tpg->se_tpg_tfo->get_fabric_name(), unpacked_lun,
1438                         tpg->se_tpg_tfo->tpg_get_tag(tpg));
1439                 spin_unlock(&tpg->tpg_lun_lock);
1440                 return NULL;
1441         }
1442         spin_unlock(&tpg->tpg_lun_lock);
1443
1444         return lun;
1445 }
1446
1447 /*      core_dev_get_lun():
1448  *
1449  *
1450  */
1451 static struct se_lun *core_dev_get_lun(struct se_portal_group *tpg, u32 unpacked_lun)
1452 {
1453         struct se_lun *lun;
1454
1455         spin_lock(&tpg->tpg_lun_lock);
1456         if (unpacked_lun > (TRANSPORT_MAX_LUNS_PER_TPG-1)) {
1457                 pr_err("%s LUN: %u exceeds TRANSPORT_MAX_LUNS_PER"
1458                         "_TPG-1: %u for Target Portal Group: %hu\n",
1459                         tpg->se_tpg_tfo->get_fabric_name(), unpacked_lun,
1460                         TRANSPORT_MAX_LUNS_PER_TPG-1,
1461                         tpg->se_tpg_tfo->tpg_get_tag(tpg));
1462                 spin_unlock(&tpg->tpg_lun_lock);
1463                 return NULL;
1464         }
1465         lun = &tpg->tpg_lun_list[unpacked_lun];
1466
1467         if (lun->lun_status != TRANSPORT_LUN_STATUS_ACTIVE) {
1468                 pr_err("%s Logical Unit Number: %u is not active on"
1469                         " Target Portal Group: %hu, ignoring request.\n",
1470                         tpg->se_tpg_tfo->get_fabric_name(), unpacked_lun,
1471                         tpg->se_tpg_tfo->tpg_get_tag(tpg));
1472                 spin_unlock(&tpg->tpg_lun_lock);
1473                 return NULL;
1474         }
1475         spin_unlock(&tpg->tpg_lun_lock);
1476
1477         return lun;
1478 }
1479
1480 struct se_lun_acl *core_dev_init_initiator_node_lun_acl(
1481         struct se_portal_group *tpg,
1482         u32 mapped_lun,
1483         char *initiatorname,
1484         int *ret)
1485 {
1486         struct se_lun_acl *lacl;
1487         struct se_node_acl *nacl;
1488
1489         if (strlen(initiatorname) >= TRANSPORT_IQN_LEN) {
1490                 pr_err("%s InitiatorName exceeds maximum size.\n",
1491                         tpg->se_tpg_tfo->get_fabric_name());
1492                 *ret = -EOVERFLOW;
1493                 return NULL;
1494         }
1495         nacl = core_tpg_get_initiator_node_acl(tpg, initiatorname);
1496         if (!nacl) {
1497                 *ret = -EINVAL;
1498                 return NULL;
1499         }
1500         lacl = kzalloc(sizeof(struct se_lun_acl), GFP_KERNEL);
1501         if (!lacl) {
1502                 pr_err("Unable to allocate memory for struct se_lun_acl.\n");
1503                 *ret = -ENOMEM;
1504                 return NULL;
1505         }
1506
1507         INIT_LIST_HEAD(&lacl->lacl_list);
1508         lacl->mapped_lun = mapped_lun;
1509         lacl->se_lun_nacl = nacl;
1510         snprintf(lacl->initiatorname, TRANSPORT_IQN_LEN, "%s", initiatorname);
1511
1512         return lacl;
1513 }
1514
1515 int core_dev_add_initiator_node_lun_acl(
1516         struct se_portal_group *tpg,
1517         struct se_lun_acl *lacl,
1518         u32 unpacked_lun,
1519         u32 lun_access)
1520 {
1521         struct se_lun *lun;
1522         struct se_node_acl *nacl;
1523
1524         lun = core_dev_get_lun(tpg, unpacked_lun);
1525         if (!lun) {
1526                 pr_err("%s Logical Unit Number: %u is not active on"
1527                         " Target Portal Group: %hu, ignoring request.\n",
1528                         tpg->se_tpg_tfo->get_fabric_name(), unpacked_lun,
1529                         tpg->se_tpg_tfo->tpg_get_tag(tpg));
1530                 return -EINVAL;
1531         }
1532
1533         nacl = lacl->se_lun_nacl;
1534         if (!nacl)
1535                 return -EINVAL;
1536
1537         if ((lun->lun_access & TRANSPORT_LUNFLAGS_READ_ONLY) &&
1538             (lun_access & TRANSPORT_LUNFLAGS_READ_WRITE))
1539                 lun_access = TRANSPORT_LUNFLAGS_READ_ONLY;
1540
1541         lacl->se_lun = lun;
1542
1543         if (core_update_device_list_for_node(lun, lacl, lacl->mapped_lun,
1544                         lun_access, nacl, tpg, 1) < 0)
1545                 return -EINVAL;
1546
1547         spin_lock(&lun->lun_acl_lock);
1548         list_add_tail(&lacl->lacl_list, &lun->lun_acl_list);
1549         atomic_inc(&lun->lun_acl_count);
1550         smp_mb__after_atomic_inc();
1551         spin_unlock(&lun->lun_acl_lock);
1552
1553         pr_debug("%s_TPG[%hu]_LUN[%u->%u] - Added %s ACL for "
1554                 " InitiatorNode: %s\n", tpg->se_tpg_tfo->get_fabric_name(),
1555                 tpg->se_tpg_tfo->tpg_get_tag(tpg), unpacked_lun, lacl->mapped_lun,
1556                 (lun_access & TRANSPORT_LUNFLAGS_READ_WRITE) ? "RW" : "RO",
1557                 lacl->initiatorname);
1558         /*
1559          * Check to see if there are any existing persistent reservation APTPL
1560          * pre-registrations that need to be enabled for this LUN ACL..
1561          */
1562         core_scsi3_check_aptpl_registration(lun->lun_se_dev, tpg, lun, lacl);
1563         return 0;
1564 }
1565
1566 /*      core_dev_del_initiator_node_lun_acl():
1567  *
1568  *
1569  */
1570 int core_dev_del_initiator_node_lun_acl(
1571         struct se_portal_group *tpg,
1572         struct se_lun *lun,
1573         struct se_lun_acl *lacl)
1574 {
1575         struct se_node_acl *nacl;
1576
1577         nacl = lacl->se_lun_nacl;
1578         if (!nacl)
1579                 return -EINVAL;
1580
1581         spin_lock(&lun->lun_acl_lock);
1582         list_del(&lacl->lacl_list);
1583         atomic_dec(&lun->lun_acl_count);
1584         smp_mb__after_atomic_dec();
1585         spin_unlock(&lun->lun_acl_lock);
1586
1587         core_update_device_list_for_node(lun, NULL, lacl->mapped_lun,
1588                 TRANSPORT_LUNFLAGS_NO_ACCESS, nacl, tpg, 0);
1589
1590         lacl->se_lun = NULL;
1591
1592         pr_debug("%s_TPG[%hu]_LUN[%u] - Removed ACL for"
1593                 " InitiatorNode: %s Mapped LUN: %u\n",
1594                 tpg->se_tpg_tfo->get_fabric_name(),
1595                 tpg->se_tpg_tfo->tpg_get_tag(tpg), lun->unpacked_lun,
1596                 lacl->initiatorname, lacl->mapped_lun);
1597
1598         return 0;
1599 }
1600
1601 void core_dev_free_initiator_node_lun_acl(
1602         struct se_portal_group *tpg,
1603         struct se_lun_acl *lacl)
1604 {
1605         pr_debug("%s_TPG[%hu] - Freeing ACL for %s InitiatorNode: %s"
1606                 " Mapped LUN: %u\n", tpg->se_tpg_tfo->get_fabric_name(),
1607                 tpg->se_tpg_tfo->tpg_get_tag(tpg),
1608                 tpg->se_tpg_tfo->get_fabric_name(),
1609                 lacl->initiatorname, lacl->mapped_lun);
1610
1611         kfree(lacl);
1612 }
1613
1614 int core_dev_setup_virtual_lun0(void)
1615 {
1616         struct se_hba *hba;
1617         struct se_device *dev;
1618         struct se_subsystem_dev *se_dev = NULL;
1619         struct se_subsystem_api *t;
1620         char buf[16];
1621         int ret;
1622
1623         hba = core_alloc_hba("rd_mcp", 0, HBA_FLAGS_INTERNAL_USE);
1624         if (IS_ERR(hba))
1625                 return PTR_ERR(hba);
1626
1627         lun0_hba = hba;
1628         t = hba->transport;
1629
1630         se_dev = kzalloc(sizeof(struct se_subsystem_dev), GFP_KERNEL);
1631         if (!se_dev) {
1632                 pr_err("Unable to allocate memory for"
1633                                 " struct se_subsystem_dev\n");
1634                 ret = -ENOMEM;
1635                 goto out;
1636         }
1637         INIT_LIST_HEAD(&se_dev->t10_wwn.t10_vpd_list);
1638         spin_lock_init(&se_dev->t10_wwn.t10_vpd_lock);
1639         INIT_LIST_HEAD(&se_dev->t10_pr.registration_list);
1640         INIT_LIST_HEAD(&se_dev->t10_pr.aptpl_reg_list);
1641         spin_lock_init(&se_dev->t10_pr.registration_lock);
1642         spin_lock_init(&se_dev->t10_pr.aptpl_reg_lock);
1643         INIT_LIST_HEAD(&se_dev->t10_alua.tg_pt_gps_list);
1644         spin_lock_init(&se_dev->t10_alua.tg_pt_gps_lock);
1645         spin_lock_init(&se_dev->se_dev_lock);
1646         se_dev->t10_pr.pr_aptpl_buf_len = PR_APTPL_BUF_LEN;
1647         se_dev->t10_wwn.t10_sub_dev = se_dev;
1648         se_dev->t10_alua.t10_sub_dev = se_dev;
1649         se_dev->se_dev_attrib.da_sub_dev = se_dev;
1650         se_dev->se_dev_hba = hba;
1651
1652         se_dev->se_dev_su_ptr = t->allocate_virtdevice(hba, "virt_lun0");
1653         if (!se_dev->se_dev_su_ptr) {
1654                 pr_err("Unable to locate subsystem dependent pointer"
1655                         " from allocate_virtdevice()\n");
1656                 ret = -ENOMEM;
1657                 goto out;
1658         }
1659         lun0_su_dev = se_dev;
1660
1661         memset(buf, 0, 16);
1662         sprintf(buf, "rd_pages=8");
1663         t->set_configfs_dev_params(hba, se_dev, buf, sizeof(buf));
1664
1665         dev = t->create_virtdevice(hba, se_dev, se_dev->se_dev_su_ptr);
1666         if (IS_ERR(dev)) {
1667                 ret = PTR_ERR(dev);
1668                 goto out;
1669         }
1670         se_dev->se_dev_ptr = dev;
1671         g_lun0_dev = dev;
1672
1673         return 0;
1674 out:
1675         lun0_su_dev = NULL;
1676         kfree(se_dev);
1677         if (lun0_hba) {
1678                 core_delete_hba(lun0_hba);
1679                 lun0_hba = NULL;
1680         }
1681         return ret;
1682 }
1683
1684
1685 void core_dev_release_virtual_lun0(void)
1686 {
1687         struct se_hba *hba = lun0_hba;
1688         struct se_subsystem_dev *su_dev = lun0_su_dev;
1689
1690         if (!hba)
1691                 return;
1692
1693         if (g_lun0_dev)
1694                 se_free_virtual_device(g_lun0_dev, hba);
1695
1696         kfree(su_dev);
1697         core_delete_hba(hba);
1698 }